Electrical complaints by model year
Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
What owners report
On [redacted] at [redacted], while I was slowly moving my car into a parking spot, the vehicle suddenly stopped for a brief moment and then, within a second, unexpectedly accelerated forward without any input from me. The car jumped onto the pathway and collided with the glass door of the property located at [redacted] ". I attempted to control the car using the brakes immediately, but the vehicle was not responding and remained out of control. There were no alert sounds or warnings before or during the incident. The vehicle finally stopped only after hitting the glass door. I strongly believe this was caused by a software or system bug, as the sudden acceleration occurred without my intervention. Please investigate this issue thoroughly, as it raises serious safety concerns.
I was driving very slowly down a residential side street and started to pull over to the right side to park behind a car. This parking spot was on a slight incline and the curb was made up of two slanted cobblestones. After I moved in to position within about 2 ft from the car in front of me, my car quickly accelerated and slammed in to it. While I did not notice it at the time, after noticing the nature of the damage to both cars, it appeared as though the car may have tried to swerve from the curb. I believe the front sensors detected there was something in the way and the car swerved left hitting the parked car in front of me. There were no warnings before the event and I did not notice the warnings on the dashboard when the car collided because I was too upset and got out quickly, but I definitely noticed that the dashboard was lit up. …
The contact leased a 2023 Mercedes-Benz EQB 300 4MATIC. The contact stated that upon delivery of the vehicle, the contact was advised not to charge the vehicle above 80%. The contact stated that on two separate occasions, the electrical settings were reset upon starting the vehicle. The contact then received notification of NHTSA Campaign Number: 26V073000 (Electrical System); however, the part to do the recall repair was not yet available. The local dealer was not made aware of the issue. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The vehicle was not repaired. The failure mileage was approximately 15,000.
The contact owns a 2023 Mercedes-Benz EQB300. The contact stated that while driving 60 MPH, the vehicle lost automotive power and decelerated to 30 MPH. The contact drove the vehicle to a local charging station to recharge the battery; however, the vehicle failed to recharge. No warning lights were illuminated. The vehicle was towed to a local dealer where the vehicle was diagnosed, and the contact was informed that the battery had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 5,000.
The contact owns a 2022 Mercedes-Benz EQB 300 4MATIC. The contact stated that while driving approximately 45 MPH, there was an abnormal grinding sound coming from the rear of the vehicle, and the vehicle lost motive power. The contact stated that several unknown warnings illuminated. The MIL was illuminated, and the battery symbol was displayed. The messages "Reduced Drive System Performance" and "Towing not Permitted" were displayed. The accelerator pedal was depressed; however, the vehicle failed to respond as needed and stalled. The contact attempted to restart the vehicle, but the vehicle failed to restart. The vehicle was towed to a local dealer, where it was diagnosed, and several error codes for engine performance were retrieved. The vehicle was not repaired. …
The contact owns a 2022 Mercedes-Benz EQB 300 4Matic. The contact received notification of NHTSA Campaign Number: 26V073000 (Electrical System); however, the part to do the recall repair was not yet available. The contact stated that the EV battery warning light was constantly illuminated. The vehicle was taken to two dealers, including Napleton Autowerks of Indiana (1349 Indianapolis Blvd, Schererville, IN 46375), who confirmed that the parts were not yet available. The manufacturer was notified of the failure by phone and referred the contact to the dealer, who then referred the contact back to the manufacturer for assistance. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The failure mileage was approximately 38,000.
Related recalls (5)
Electrical system › Propulsion system › Traction battery
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 EQB 250+, 2022-2024 EQB 300 4MATIC, and EQB 350 4MATIC vehicles. The high voltage battery may fail internally and lead to a vehicle fire while parked or driving.
Remedy: Owners are advised to park outside and away from structures until the recall repair is complete. Also, owners are advised to only charge their vehicles to a maximum of 80% battery capacity until the remedy has been…
Electrical system › Propulsion system › Traction battery
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 EQB 250, 2022-2023 EQB 300 4MATIC, and EQB 350 4MATIC vehicles. The high voltage battery may fail internally and lead to a vehicle fire while parked or driving.
Remedy: Owners are advised to only charge their vehicles to a maximum of 80% battery capacity until the repair has been completed. Vehicles previously repaired under Recall 25V050 will need to be repaired again.
Electrical system › Propulsion system › Traction battery
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2022-2023 EQB 350 4MATIC, and EQB 300 4MATIC vehicles. The bus bar in the high voltage battery may be secured with incorrect screws, which can cause the system to have a sudden loss of drive power without warning.
Remedy: Owners are advised to park outside until the recall repair is complete. Dealers will inspect and replace the high-voltage battery as necessary, free of charge.
Electrical system › Propulsion system › Traction battery
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2022-2025 EQB 250, EQB 300 4MATIC, and EQB 350 4MATIC electric vehicles. The high voltage battery may fail internally and lead to a vehicle fire while parked or driving.
Remedy: Owners are advised to only charge their vehicles to a maximum of 80% battery capacity until the repair has been completed. Dealers will update the battery management system software, free of charge.
Electrical system › Propulsion system
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2022 EQB 300 and EQB 350 vehicles. The welded spur gear within the front axle electric drivetrain may not have been welded properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 114, "Theft Protection."
Remedy: Dealers will replace the front axle electric drivetrain, free of charge. Owner notification letters were mailed on August 9, 2024. Owners may contact MBUSA at 1-800-367-6372. MBUSA's number for this recall is 2024060007.
Frequently asked questions
Which Mercedes-Benz EQB300 years have electrical problems?
By NHTSA complaints, the 2023 (39), 2022 (11) and 2024 (5) model years. Electrical complaints make up 72% of all complaints for the 2023.
Is there a recall for Mercedes-Benz EQB300 electrical problems?
Yes — 5 recalls, including 26V-073 (traction battery, Feb 6, 2026); 25V-894 (traction battery, Dec 19, 2025); 25V-487 (traction battery, Jul 25, 2025). Recall repairs are free at authorized dealers; check a specific car with the VIN recall check.
At what mileage do Mercedes-Benz EQB300 electrical problems start?
Across all years, half of the complaints with a recorded mileage happened before about 34,000 miles; 83% happened before 50,000 miles.
What part fails most often?
Owners most often name the propulsion system › traction battery (1 mentions), followed by the 12v/24v/48v battery (1).
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.